/**
 * CopyRight 北京博雅立方
 */
package net.hvacapp.cmvrfforandroid.widget;

import android.content.Context;
import android.graphics.drawable.Drawable;
import android.text.Editable;
import android.text.TextWatcher;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnFocusChangeListener;
import android.view.animation.Animation;
import android.view.animation.CycleInterpolator;
import android.view.animation.TranslateAnimation;
import android.widget.EditText;

import net.hvacapp.cmvrfforandroid.R;


/**
 * 带清楚按钮的EditText
 *
 * @author hailong.han
 */
public class ClearEditText extends EditText implements OnFocusChangeListener,
        TextWatcher {

    // 是否有焦点
    private boolean hasFoucs = false;

    // 删除按钮
    private Drawable mClearDrawable;

    public ClearEditText(Context context) {
        this(context, null);
    }

    public ClearEditText(Context context, AttributeSet attrs) {
        this(context, attrs, android.R.attr.editTextStyle);
    }

    public ClearEditText(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        init();
    }

    /**
     *
     */
    private void init() {
        // 获取EditText的DrawableRight,假如没有设置我们就使用默认的图片
        mClearDrawable = getCompoundDrawables()[2];
        // 如果没有设置，就采用默认的图标
        if (mClearDrawable == null) {
            mClearDrawable = getResources().getDrawable(R.drawable.clear);
        }

        mClearDrawable.setBounds(0, 0, mClearDrawable.getIntrinsicWidth(),
                mClearDrawable.getIntrinsicHeight());

        setClearIconVisible(false);
        // 设置焦点监听的变化
        setOnFocusChangeListener(this);
        // 设置输入框里面内容发生改变的监听
        addTextChangedListener(this);
    }

    /**
     * 设置清除图标的显示与隐藏，调用setCompoundDrawables为EditText绘制上去
     *
     * @param visible
     */
    private void setClearIconVisible(boolean visible) {
        Drawable right = visible ? mClearDrawable : null;
        setCompoundDrawables(getCompoundDrawables()[0],
                getCompoundDrawables()[1], right, getCompoundDrawables()[3]);
    }

    /**
     * 因为我们不能直接给EditText设置点击事件，所以我们用记住我们按下的位置来模拟点击事件 当我们按下的位置 在 EditText的宽度 -
     * 图标到控件右边的间距 - 图标的宽度 和 EditText的宽度 - 图标到控件右边的间距之间我们就算点击了图标，竖直方向就没有考虑
     */
    @Override
    public boolean onTouchEvent(MotionEvent event) {
        if (event.getAction() == MotionEvent.ACTION_UP) {// 手指抬起的时候

            if (getCompoundDrawables()[2] != null) {
                boolean touchble = event.getX() > (getWidth() - getTotalPaddingRight())
                        && event.getX() < (getWidth() - getPaddingRight());
                if (touchble) {
                    this.setText("");
                }
            }
        }
        return super.onTouchEvent(event);
    }

    @Override
    public void beforeTextChanged(CharSequence s, int start, int count,
                                  int after) {

    }

    @Override
    public void onTextChanged(CharSequence text, int start, int lengthBefore,
                              int lengthAfter) {
        super.onTextChanged(text, start, lengthBefore, lengthAfter);
    }

    @Override
    public void afterTextChanged(Editable s) {
        if (hasFoucs) {
            setClearIconVisible(s.length() > 0);
        }
    }

    @Override
    public void onFocusChange(View v, boolean hasFocus) {
        this.hasFoucs = hasFocus;
        if (hasFocus) {
            setClearIconVisible(getText().length() > 0);
        } else {
            setClearIconVisible(false);
        }
    }

    public void setShakeAnimation() {
        this.setAnimation(shakeAnimation(5));
    }

    private Animation shakeAnimation(int count) {
        Animation transAnimation = new TranslateAnimation(0, 10, 0, 0);
        transAnimation.setInterpolator(new CycleInterpolator(count));
        transAnimation.setDuration(1000);
        return transAnimation;
    }
}
